清水河河岸带土壤重金属源解析及污染风险评价  

Analysis of Soil Heavy Metal Sources and Pollution Risk Assessment in the Riparian Zone of Qingshuihe River

作　　者：付永亮 赵增锋 邱小琮[2] FU Yong-liang;ZHAO Zeng-feng;QIU Xiao-cong(School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China;School of Life Science,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]宁夏大学生命科学学院,宁夏银川750021

出　　处：《水电能源科学》2024年第10期69-72,68,共5页Water Resources and Power

基　　金：宁夏大学研究生创新项目(CXXM202339);宁夏高等学校一流学科建设(水利工程)项目(NXYLXK2021A03)。

摘　　要：为探究清水河河岸带土壤重金属的来源及污染状况,于2023年5月对清水河河岸带土壤32个样点中砷(As)、六价铬(Cr)、铅(Pb)、汞(Hg)4种重金属进行采样调查,综合运用描述性统计法、相关分析、聚类分析、APCS-MLR模型以及污染负荷指数(PLI)和潜在生态风险指数(RI)对污染源进行解析与评价。结果表明,清水河河岸带土壤重金属As、Pb元素含量均低于宁夏土壤背景值,Cr元素只在S6(苋麻河)和S9(折死沟)处出现超标现象,为影响土壤状况的风险元素,Hg元素为主要生态超标元素;As、Pb、Hg具有显著相关性和同源性,主要受农业发展、交通运输等人为源和燃料燃烧、酸性废水排放等未知源的影响,As元素还与地质因素有关,Cr元素除受成土母质影响外,还受工业生产的影响;清水河河岸带土壤均处于污染状态,最严重区域为S6(苋麻河)区,属于很强危害区域,最轻区域为S4(冬至河)区,属于轻微危害区域。In order to explore the sources and pollution status of heavy metals in the soil of the Qingshuihe River riparian zone,a sampling survey was conducted in May 2023 on four heavy metals from 32 sampling points,such as arsenic(As),hexavalent chromium(Cr),lead(Pb),and mercury(Hg).Descriptive statistical methods,correlation analysis,cluster analysis,APCS-MLR model,pollution load index(PLI),and potential ecological risk index(RI)were comprehensively used to evaluate the pollution sources.The results show that the contents of heavy metals As and Pb elements in the Qingshuihe River riparian zone were lower than the soil background values in Ningxia,and the Cr elements only exceeded the standard at S6(Xianma river)and S9(dead ditch),which were the risk elements affecting the soil conditions,and Hg elements were the main ecological excess elements.As,Pb and Hg have significant correlation and homology,mainly affected by artificial sources such as agricultural development and transportation,fuel combustion,acid wastewater discharge and other unknown sources.Arsenic is also associated with geological factors.Cr elements are not only affected by soil parent material,but also by industrial production.The soil in the riparian zone of the Qingshuihe River is in a polluted state,the most serious area is the S6(Xianma River)area,which belongs to the strong hazard area,and the lightest area is the S4(winter solstice river)area,which belongs to minor hazard area.

关 键 词：清水河 河岸带 土壤 重金属 污染状况 源解析 

分 类 号：X53[环境科学与工程—环境工程]